PUL-E-ALAM, Afghanistan, July 22 (Xinhua) -- At least nine civilians were killed and six others wounded in an airstrike in Afghanistan's eastern province of Logar overnight, sources said on Monday.

"The sortie struck a house in Khaki Dakhta locality of Baraki Barak district. Those among the killed were four children and the injured included four women," a local leader Salim Nahimzoi told Xinhua.

Local villagers shifted the injured to a hospital in provincial capital, Pul-e-Alam, he said.

Provincial police spokesman Shahpoor Ahmadzai, confirmed the incident with Xinhua, saying, "an investigation has been initiated by provincial officials and details will be shared with media after the probe."

It was not immediately known whether the strike was conducted by the Afghan Air Force or the NATO-led coalition forces.

Similar incidents had happened in the past and Afghan observers said civilian casualties undermine the war against Taliban militants and other terrorist groups.

More than 32,600 civilians have died and about 60,700 have been injured in conflicts in Afghanistan since January 2009, according to figures of the UN mission in the country.